<template>
  <div class="app-container">
    <el-table
      ref="dragTable"
      v-loading="listLoading"
      :data="list"
      row-key="id"
      border
      fit
      highlight-current-row
      style="width: 100%"
    >
      <el-table-column align="center" label="ID" width="65">
        <template slot-scope="{ row }">
          <span>{{ row.id }}</span>
        </template>
      </el-table-column>

      <el-table-column width="180px" align="center" label="Date">
        <template slot-scope="{ row }">
          <span>{{ row.timestamp | parseTime("{y}-{m}-{d} {h}:{i}") }}</span>
        </template>
      </el-table-column>

      <el-table-column min-width="300px" label="Title">
        <template slot-scope="{ row }">
          <span>{{ row.title }}</span>
        </template>
      </el-table-column>

      <el-table-column width="110px" align="center" label="Author">
        <template slot-scope="{ row }">
          <span>{{ row.author }}</span>
        </template>
      </el-table-column>

      <el-table-column width="100px" label="Importance">
        <template slot-scope="{ row }">
          <svg-icon
            v-for="n in +row.importance"
            :key="n"
            icon-class="star"
            class="icon-star"
          />
        </template>
      </el-table-column>

      <el-table-column align="center" label="Readings" width="95">
        <template slot-scope="{ row }">
          <span>{{ row.pageviews }}</span>
        </template>
      </el-table-column>

      <el-table-column class-name="status-col" label="Status" width="110">
        <template slot-scope="{ row }">
          <el-tag :type="row.status | statusFilter">
            {{ row.status }}
          </el-tag>
        </template>
      </el-table-column>

      <el-table-column align="center" label="Drag" width="80">
        <template slot-scope="{}">
          <svg-icon class="drag-handler" icon-class="drag" />
        </template>
      </el-table-column>
    </el-table>
    <div class="show-d">
      <el-tag style="margin-right: 12px">{{ $t("table.dragTips1") }} :</el-tag>
      {{ oldList }}
    </div>
    <div class="show-d">
      <el-tag>{{ $t("table.dragTips2") }} :</el-tag> {{ newList }}
    </div>
  </div>
</template>

<script>
import Sortable from "sortablejs";
export default {
  name: "DragTable",
  filters: {
    statusFilter(status) {
      const statusMap = {
        published: "success",
        draft: "info",
        deleted: "danger",
      };
      return statusMap[status];
    },
  },
  data() {
    return {
      list: [],
      total: null,
      listLoading: true,
      listQuery: {
        page: 1,
        limit: 10,
      },
      sortable: null,
      oldList: [],
      newList: [],
    };
  },
  created() {
    this.getList();
  },
  methods: {
    async getList() {
      this.listLoading = true;
      const { data } = await this.$apis.article.fetchList(this.listQuery);
      this.list = data.items;
      this.total = data.total;
      this.listLoading = false;
      this.oldList = this.list.map((v) => v.id);
      this.newList = this.oldList.slice();
      this.$nextTick(() => {
        this.setSort();
      });
    },
    setSort() {
      const el = this.$refs.dragTable.$el.querySelectorAll(
        ".el-table__body-wrapper > table > tbody"
      )[0];
      this.sortable = Sortable.create(el, {
        ghostClass: "sortable-ghost", // Class name for the drop placeholder,
        setData: function (dataTransfer) {
          // to avoid Firefox bug
          // Detail see : https://github.com/RubaXa/Sortable/issues/1012
          dataTransfer.setData("Text", "");
        },
        onEnd: (evt) => {
          const targetRow = this.list.splice(evt.oldIndex, 1)[0];
          this.list.splice(evt.newIndex, 0, targetRow);

          // for show the changes, you can delete in you code
          const tempIndex = this.newList.splice(evt.oldIndex, 1)[0];
          this.newList.splice(evt.newIndex, 0, tempIndex);
        },
      });
    },
  },
};
</script>

<style>
.sortable-ghost {
  opacity: 0.8;
  color: #fff !important;
  background: #42b983 !important;
}
</style>

<style scoped>
.icon-star {
  margin-right: 2px;
}
.drag-handler {
  width: 20px;
  height: 20px;
  cursor: pointer;
}
.show-d {
  margin-top: 15px;
}
</style>